Judging by Nue's hand motions in the first panel I think they're trying to jog her memory with sexual innuendo. Considering how often that's a topic in this series I'd say that would work really well.
There goes Nue with that mysterious hand signal again...
Only her recent memories have completely disappeared...No...
It's sort of......Uh... S-sorry...What's today's date?Do you know your name?It seems she still has her life and conversation skills, but......it feels good between my legs, but I wonder if I'm doing something bad...Squirm—And...Hm, I see.How do you think the boy students all around were looking at you?...wearing this floaty clothing down here...FidgetHeyyy, therrrre.And how old were you when you did it?...when I... when I use a climbing pole...